Daily Sunspot Evaluation
Observation Sheet Tuesday, 28 September 1999
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 5
- Number of spots (f)
- 12
- Relative number (R)
- 62
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19990928.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 19 | 34W | 207 | 36W | 5 | |
| 2 | AX – 5 | 22 | 23W | 198 | 25W | 3 | Bx0-5 |
| 3 | HA – 2 | 19 | 60E | 115 | 59E | 4 | |
| 4 | HA – 2 | -21 | 75W | 250 | 77W | 2.5 | |
| 5 | HR – 1 | -13 | 16E | 159 | 14E | 0.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.